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I have read that SIP-400 and SPA are compatible with 6509 series switch. These SIP and SPA are used to terminate PPP sessions on 7600 routers. If I installed this SIP and SPA (SPA-5X1GE-V2 for example) on my 6509 chassis, could I configure the switch to terminate PPPoE sessions as a BRAS? In that case, which IOS would support this feature?

The switch has SUP720-PFC3BXL supervisors.

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I have read that SIP-400 and SPA are compatible with 6509 series switch. These SIP and SPA are used to terminate PPP sessions on 7600 routers. If i installed this SIP and SPA (SPA-5X1GE-V2 for example) on my 6509 chassis, could i configure the switch to terminate PPPoE sessions? In that case, which IOS would support this feature?

The switch has SUP720-PFC3BXL supervisors.

I have some good news, and bad news:

Good news, the Cisco 7600 supports PPPoE on 7600-SIP-400, see the SIP-400 PPPoE configuration guide. However, starting in IOS 15.2(4)S, the 7600 does not support PPPoE.1

Bad news, PPPoE on SIP-400 requires 12.2SR, and the Sup720-3CXL is not supported in 12.2SR.2; however, Sup720-3B / 3BXL are supported in 12.2SR (see the List of 12.2SR supported hardware for more details).

PPPoE on SIP-400 Requirements:

Restrictions:

  • Customers are discouraged from loading 12.2SR on a Catalyst 6500 branded chassis for PPPoE functionality. Please contact your Cisco account manager if you want to do this.
  • Sup720-3C is not supported, only Sup720-3B, Sup720-3BXL and RSP720 are supported
  • Up to 8000 PPPoE sessions per SIP-400, maximum 32000 PPPoE sessions per chassis (across multple linecards)
  • PBR is not supported on Virtual Template interfaces


1 After Feb 2012, Cisco encourages customers to use the ASR9K for PPPoE termination.
2 The 6500 and 7600 used to share a lot of hardware and software (sometimes on different SW releases), but that sharing has decreased after the release of 12.2(33)SR / 12.2(33)SX.

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  • Thanks for your answer!!! So, all these restrictions are for both chassis 7600 and 6500 or only for the 7600?
    – RS1983
    Jan 28 '14 at 11:08
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    Certainly... pppoe is limited to the 7600 when using 12.2sr... I hope you have some Sup720-3Bs lying around otherwise, it's an expenditure. Let me know how this works out for you, I'm curious...
    – This
    Jan 28 '14 at 11:09
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    Yeah, PPPoE on Sup720 + SIP-400 scales much better than PPPoE on the NPE-G2, because on the 7600, PPPoE is distributed to SIP-400 HW
    – This
    Jan 28 '14 at 11:14
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    I have one 7206VXR with 3'7K PPPoE Session but CPU average load is 42% (limit i think is on traffic... it supports about 1'8G and we have 1G sometimes)
    – RS1983
    Jan 28 '14 at 11:18
  • 1
    @RS1983, I used to work for this BU and emailed some old contacts to see if they had anything to add to the answer; please see my updates.
    – This
    Jan 30 '14 at 10:50

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